Disclosed are a device, a method, and a program for training memory using brain stimulation. The method includes at least: displaying a first problem on a task display portion of a screen; receiving a first response corresponding to the first problem; and evaluating a memory state of a user based on the first response. The first problem includes one or more output images to be displayed at a specific location within the task display portion, and the first response includes a result of comparing a previous first problem that was displayed before N times (N is a natural number) of executing the method, with the displayed first problem.